Question
A 75-kg man is at rest on ice skates. A 0.20-kg ball is thrown to him. The ball is moving horizontally at $25 \mathrm{m} / \mathrm{s}$ just before the man catches it. How fast is the man moving just after he catches the ball?
Step 1
According to this principle, the total momentum of an isolated system remains constant if no external forces act on it. In this case, the system is the man and the ball, and it is isolated because there are no external forces acting on it (we are ignoring friction Show more…
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